Nuisance Aquatic Vegetation

Not all aquatic vegetation is "nuisance" vegetation. Most lakes and rivers
contain some plant life. Tiny, free-floating algae known as phytoplankton provide
food
for
insects
and
other
invertebrates,
which
are eaten in turn by fish. Large plants such as waterlilies provide cover and
food for fish and other wildlife. Aquatic ecosystems with healthy plant communities
are usually more productive than those without plants.

Sometimes, however, aquatic plants get out of control. Overabundant vegetation
can limit recreational access, restrict flow rates in canals and rivers, interfere
with industrial water uses, and harm fish and wildlife.
Problems are most likely to arise when exotic plant species are
involved. In recent decades, species such as hydrilla, waterhyacinth, and giant
salvinia have invaded many Texas waterways. These introduced plants often grow
rapidly, displacing more beneficial native species, and they can travel
from one watershed to another by way of boat propellers, bilges,
and
livewells.

TPWD Activities

Elimination of all aquatic vegetation is seldom practical, or even desirable.
As the agency responsible for managing fish and wildlife resources in this
state, Texas Parks and Wildlife Department focuses on stands of plants
that directly affect the health and recreational use of those resources and
works
with other organizations to develop treatment measures that minimize
harm to the environment. The primary responsibility for vegetation control
in waters not directly controlled by TPWD rests with landowners and agencies
that control water use.

Public Water

Under the State Aquatic Vegetation Management Plan, organizations and individuals
wishing to conduct vegetation management activities in public water must first
submit a Treatment Proposal for review by TPWD and local
controlling
entities. The proposal form and other useful information are provided in the
Guidelines for Control in Public Waters, linked below.

Private Water

When problem vegetation appears in a private lake or pond, control is up
to the landowner. Resources
to assist in determining the best treatment method are listed below. Treatment
proposals are not required; however, certain control methods are governed by
state law. A TPWD permit is required to
stock triploid grass carp in public or private water. Use of herbicides
containing 2,4-D requires a pesticide applicator’s license; check with
the Texas Department of Agriculture for the latest regulations.